A METHOD OF SAMPLING INSPECTION 



625 



0.1 0.2 0.3 0.4 0.5 0.6 



RATIO OF PROCESS AVERAGE TO TOLERANCE 



[p/p^. = (PROCESS AVERAGE FRACTION DEFECTIVE )/ (TOLERANCE FRACTION DEFECTIVE)] 



Fig. 4 — Curves for finding the minimum amount of inspection per lot. 



